As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO, LEFT SIDE PLATE CHANNEL CORRODED FROM STA727B TO STA 787. GROUNDED - YES. REMOVED CORROSION AND CHECKED LIMITS, FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-00-53-1A-2 REPAIRED SIDE PLATE CHANNEL IAW B737-900ER SRM 53-00-53-2R-5 REPAIR 5.